Which labels best complete the diagram?
X: Two-chambered heart
Y: Swim bladder
X: Single-chambered heart
Y: Swim bladder
X: Gills
Y: Lateral line
X: Lungs
Y: Lateral line
![Which labels best complete the diagram X Twochambered heart Y Swim bladder X Singlechambered heart Y Swim bladder X Gills Y Lateral line X Lungs Y Lateral line class=](https://us-static.z-dn.net/files/dc1/d77c7acc88abf1b313d2d5c0d7c7aa80.png)